Patterning Liquid Crystalline Organic Semiconductors via Inkjet Printing for High‐Performance Transistor Arrays and Circuits

2021 ◽  
pp. 2100237
Author(s):  
Xiaochen Fang ◽  
Jialin Shi ◽  
Xiujuan Zhang ◽  
Xiaobin Ren ◽  
Bei Lu ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
Inkjet Printing ◽  
High Performance ◽  
Liquid Crystalline

Novel High-Performance Liquid-Crystalline Organic Semiconductors for Thin-Film Transistors

2009 ◽  
Vol 21 (13) ◽  
pp. 2727-2732 ◽  
Author(s):  
Ping Liu ◽  
Yiliang Wu ◽  
Hualong Pan ◽  
Yuning Li ◽  
Sandra Gardner ◽  
...  
Keyword(s):  
Thin Film ◽  
Organic Semiconductors ◽  
Thin Film Transistors ◽  
High Performance ◽  
Liquid Crystalline

Inkjet Printed Organic Thin Film Transistors: Achievements and Challenges

2012 ◽  
Vol 736 ◽  
pp. 250-274 ◽  
Author(s):  
Saumen Mandal ◽  
Gangadhar Purohit ◽  
Monica Katiyar
Keyword(s):  
Thin Film ◽  
Organic Semiconductors ◽  
Inkjet Printing ◽  
Thin Film Transistors ◽  
High Performance ◽  
Dielectric Material ◽  
Organic Thin Film Transistors ◽  
Metal Nanoparticle ◽  
Organic Thin Film ◽  
New Device

Inkjet printing of organic thin film transistors is an enabling technology for many applications requiring low cost electronics such as RFID tags, sensors, e-paper, and displays. This review summarizes the achievements and remaining challendges in the field. An all inkjet printed organic thin film transistor is feasible, but manufacturability needs to be improved. Often, a hybrid process in which only some layers are inkjet printed is used. Development of devices requires optimization of (1) ink chemistry, (2) inkjet process, (3) substrate ink interaction, and (4) new device structures. Several conducting, dielectric and semiconducting materials have been used to formulate ink. It appears that metal nanoparticle based conducting ink and PEDOT:PSS are widely used materials to fabricate source, drain and gate electrodes. PVPh is the most popular dielectric material for inkjet printing. To print semiconducting layer, both polymers and oligomers/small molecules are used. Many high performance organic semiconductors are p-type, but few n-type organic semiconductors show excellent performance. In addition to improved materials, challenges inherent in the inkjet process also need solutions. These are registration, alignment of the source,and drain with gate, resolution, reducing off-state current, and roll-to-roll processing.

Morphology of High-Performance Rigid-Rod Polymer Fibers and Molecular Composites

1989 ◽  
Vol 47 ◽  
pp. 338-339
Author(s):  
W.W. Adams ◽  
S. J. Krause
Keyword(s):  
Tensile Strength ◽  
High Performance ◽  
Liquid Crystalline ◽  
Molecular Level ◽  
Synergistic Effects ◽  
Tensile Modulus ◽  
Commercial Development ◽  
The Matrix ◽  
Molecular Composites ◽  
Rigid Rod

Rigid-rod polymers such as PBO, poly(paraphenylene benzobisoxazole), Figure 1a, are now in commercial development for use as high-performance fibers and for reinforcement at the molecular level in molecular composites. Spinning of liquid crystalline polyphosphoric acid solutions of PBO, followed by washing, drying, and tension heat treatment produces fibers which have the following properties: density of 1.59 g/cm3; tensile strength of 820 kpsi; tensile modulus of 52 Mpsi; compressive strength of 50 kpsi; they are electrically insulating; they do not absorb moisture; and they are insensitive to radiation, including ultraviolet. Since the chain modulus of PBO is estimated to be 730 GPa, the high stiffness also affords the opportunity to reinforce a flexible coil polymer at the molecular level, in analogy to a chopped fiber reinforced composite. The objectives of the molecular composite concept are to eliminate the thermal expansion coefficient mismatch between the fiber and the matrix, as occurs in conventional composites, to eliminate the interface between the fiber and the matrix, and, hopefully, to obtain synergistic effects from the exceptional stiffness of the rigid-rod molecule. These expectations have been confirmed in the case of blending rigid-rod PBZT, poly(paraphenylene benzobisthiazole), Figure 1b, with stiff-chain ABPBI, poly 2,5(6) benzimidazole, Fig. 1c A film with 30% PBZT/70% ABPBI had tensile strength 190 kpsi and tensile modulus of 13 Mpsi when solution spun from a 3% methane sulfonic acid solution into a film. The modulus, as predicted by rule of mixtures, for a film with this composition and with planar isotropic orientation, should be 16 Mpsi. The experimental value is 80% of the theoretical value indicating that the concept of a molecular composite is valid.

Fused Ambipolar Aza-isoindigos with NIR absorption

2021 ◽  
Author(s):  
Liping Yao ◽  
Danlei Zhu ◽  
Hailiang Liao ◽  
Sheik Haseena ◽  
Mahesh kumar Ravva ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
High Performance ◽  
Low Cost ◽  
Light Weight ◽  
The Past ◽  
Pi Conjugated ◽  
Nir Absorption ◽  
Conjugated Organic Semiconductors

Due to their advantages of low-cost, light-weight, and mechanical flexibility, much attention has been focused on pi-conjugated organic semiconductors. In the past decade, although many materials with high performance has...

scholarly journals High-performance organic semiconductors for thin-film transistors based on 2,7-divinyl[1]benzothieno[3,2-b]benzothiophene

2008 ◽  
Vol 18 (39) ◽  
pp. 4698 ◽  
Author(s):  
Myoung-Chul Um ◽  
Jeonghun Kwak ◽  
Jung-Pyo Hong ◽  
Jihoon Kang ◽  
Do Yeung Yoon ◽  
...  
Keyword(s):  
Thin Film ◽  
Organic Semiconductors ◽  
Thin Film Transistors ◽  
High Performance

High-Performance n-type Organic Semiconductors: Incorporating Specific Electron-Withdrawing Motifs to Achieve Tight Molecular Stacking and Optimized Energy Levels

2012 ◽  
Vol 24 (7) ◽  
pp. 911-915 ◽  
Author(s):  
Sun Woo Yun ◽  
Jong H. Kim ◽  
Seunghoon Shin ◽  
Hoichang Yang ◽  
Byeong-Kwan An ◽  
...  
Keyword(s):  
Organic Semiconductors ◽  
High Performance ◽  
Energy Levels ◽  
Molecular Stacking

Charge-Transport in Crystalline Organic Semiconductors with Liquid Crystalline Order.

ChemInform ◽  
2005 ◽  
Vol 36 (44) ◽  
Author(s):  
Panos Vlachos ◽  
Bassam Mansoor ◽  
Matthew P. Aldred ◽  
Mary O'Neill ◽  
Stephen M. Kelly
Keyword(s):  
Charge Transport ◽  
Organic Semiconductors ◽  
Liquid Crystalline ◽  
Crystalline Order

Tailoring crystal polymorphs of organic semiconductors towards high-performance field-effect transistors

2016 ◽  
Vol 27 (8) ◽  
pp. 1330-1338 ◽  
Author(s):  
Yong-Gang Zhen ◽  
Huan-Li Dong ◽  
Lang Jiang ◽  
Wen-Ping Hu
Keyword(s):  
Organic Semiconductors ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistors

scholarly journals 2,2'-(Arylenedivinylene)bis-8-hydroxyquinolines exhibiting aromatic π-π stacking interactions as solution-processable p-type organic semiconductors for high-performance organic field effect transistors

2021 ◽  
Author(s):  
Suman Yadav ◽  
Shivani Sharma ◽  
Satinder K Sharma ◽  
Chullikkattil P. Pradeep
Keyword(s):  
Organic Semiconductors ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistor ◽  
Field Effect Transistors ◽  
Organic Field Effect Transistors ◽  
Organic Thin Film ◽  
Effect Transistor ◽  
Solution Processable ◽  
P Type

Solution-processable organic semiconductors capable of functioning at low operating voltages (~5 V) are in demand for organic field-effect transistor (OFET) applications. Exploration of new classes of compounds as organic thin-film...

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